.main {
    margin: 0 auto;
    width: 1000px;
    height: 5000px;
    position: relative;
}
.content {
    margin: 0 auto;
    width: 800px;
    height: 5000px;
    background: rgb(136, 196, 216);
}
/* 左边广告 */
#guang1 {
    position: absolute;
    left: -400px;
    top: 200px;
    width: 205px;
    height: 310px;
}
#a1 {
    width: 205px;
    height: 310px;
}
.a2 {
    position: relative;
    width: 205px;
    height: 310px;
}

/* 右边广告 */
#guang2 {
    position: absolute;
    right: -110px;
    top: 10px;
    width: 205px;
    height: 310px;
}
#b1 {
    width: 205px;
    height: 310px;
}
.b2 {
    width: 205px;
    height: 310px;
}

/* 弹出广告 */
#guang3 {
    width: 500px;
    height: 700px;
    position: fixed;
    right: 0;
    bottom: -700px;
    transition: bottom 1s ease-in-out;
}
#guang3.show {
    bottom: 0;
}
#c1 {
    width: 320px;
    height: 180px;
}

.c2 {
    width: 205px;
    height: 310px;
}


/* 关闭 */
.guant1 {
    position: absolute;
    left: 0;
    top: 0;
    background: #fff;
    border: 1px solid black;
    padding: 1px 4px;
    font-size: 4px;
    cursor: pointer;
}

.guant2 {
    position: absolute;
    left: 16px;
    top: 0;
    background: #fff;
    border: 1px solid black;
    padding: 1px 2px;
    font-size: 4px;
    cursor: pointer;
}